Add regress coverage for obj_dat.c r1.52

diff --git a/regress/lib/libcrypto/objects/objectstest.c b/regress/lib/libcrypto/objects/objectstest.c
index dba3864..cb22709 100644 (file)
--- a/regress/lib/libcrypto/objects/objectstest.c
+++ b/regress/lib/libcrypto/objects/objectstest.c
@@ -1,4 +1,4 @@
-/* $OpenBSD: objectstest.c,v 1.6 2022/09/05 21:06:31 tb Exp $ */
+/* $OpenBSD: objectstest.c,v 1.7 2023/05/23 11:05:09 tb Exp $ */
 /*
  * Copyright (c) 2017, 2022 Joel Sing <jsing@openbsd.org>
  *
@@ -396,6 +396,47 @@ obj_txt_test(struct obj_test *ot)
        return failed;
 }
 
+static int
+obj_txt_early_nul_test(void)
+{
+       ASN1_OBJECT *obj = NULL;
+       char buf[2];
+       int failed = 1;
+
+       buf[0] = 'x';
+       buf[1] = '\0';
+
+       if (OBJ_obj2txt(buf, sizeof(buf), NULL, 1) != 0) {
+               fprintf(stderr, "FAIL: OBJ_obj2txt(NULL) succeded\n");
+               goto failed;
+       }
+       if (buf[0] != '\0') {
+               fprintf(stderr, "FAIL: OBJ_obj2txt(NULL) did not NUL terminate\n");
+               goto failed;
+       }
+
+       if ((obj = ASN1_OBJECT_new()) == NULL)
+               errx(1, "ASN1_OBJECT_new");
+
+       buf[0] = 'x';
+       buf[1] = '\0';
+
+       if (OBJ_obj2txt(buf, sizeof(buf), obj, 1) != 0) {
+               fprintf(stderr, "FAIL: OBJ_obj2txt(obj) succeeded\n");
+               goto failed;
+       }
+       if (buf[0] != '\0') {
+               fprintf(stderr, "FAIL: OBJ_obj2txt(obj) did not NUL terminate\n");
+               goto failed;
+       }
+
+       failed = 0;
+ failed:
+       ASN1_OBJECT_free(obj);
+
+       return failed;
+}
+
 static int
 obj_txt_tests(void)
 {
@@ -405,6 +446,8 @@ obj_txt_tests(void)
        for (i = 0; i < N_OBJ_TESTS; i++)
                failed |= obj_txt_test(&obj_tests[i]);
 
+       failed |= obj_txt_early_nul_test();
+
        return failed;
 }